Lttigi jano



L. JANO.

FILE.

APPLICATION FILED NOV. 5. IQIH.

1 ,3 1 6 ,898, Patented Sept. 23, 1919.

DYVEIYTOE I @W DY HTTORIYEYJI' Tllu COLUMBIA Pumomul'u cm. WASIIINUTHN.II. c.

LUIGI JANO, OF TUBIN, ITALY.

FILE.

Specification of Letters Patent.

Patented Sept. 23, 1919.

Application filed November 5, 1918. Serial No. 261,310.

To all whom it may concern:

Be it known that I, LUIGI J ANO, mechanic, a subject of the King ofItaly, and residing in Turin, Italy, have invented certain new anduseful Improvements in Files, of which the following is a full, clear,and exact specification.

The present invention has for its object a special file provided withteeth the position of which can be easily altered and which can bereadily sharpened by the man who uses the tool.

A practical form of the invention is show by way of example on theannexed drawings.

In said draw1ngs,-

Figure 1 is a longitudinal sectional view of the device with the platesconstituting the teeth in operative position;

Fig. 2 is a similar view with the plates in position for planing inorder to sharpen the cutting edges;

Fig. 3 is a transverse sectional view, and

Fig. 1 is a top plan view;

Fig. 5 is a perspective view of one of the parts 2. I

The file comprises a frame 1 having the form of a rectangular casing thesize of which varies according to the dimension wanted for the fileitself. In the rectangular casing a set of small plates 2 is placed; thesaid plates have a rhomboidal form and are provided with a tail-piecehaving a hole through which passes a cross-pin 3 around which they canrotate. The ends of the pins or pivots 3 can slide in suitable grooves24 in the sides of the casing l, and the plates 2 are placed in aninclined position, those of one set bearing against those of thepreceding set or line, and alternately disposed in the cross-direction.The inclination of the plates 2 can be altered and they can be fixed inany desired position by means of set screws 6 and 10 passing through theheads 7 and 9 of the casing 1 and bearin against small slidable blocks 8and 5. By inclining the plates toward the left-hand side of the drawing,the plates 2 will reach such a po sition that they do not project one asregards the other, but their upper sides are all flush in one and thesame plane as shown on Fig. 2.

In said position (Fig. 2) the file is ready for sharpening which iseffected by simply smoothing with a planing mill the upper surface ofthe plates.

After the file is sharpened the screw 10 is loosened and the screw 6 istightened so that the plates will turn around the pivots 3 and thecutting edge of each plate w1ll thus project. Said projection of thecutting edges of the plates can be varied according to the differentkind of work on which the file is to be used so that a file which ismost suitable to the work in hand is automatically obtained. The casing1 may be provided with a handle 11.

If thought to be more suitable, the pivots 3 can be fixed incorresponding holes in the sides of the casing, in which case the holesmust be so spaced as to allow for the rotation of the plates until theirupper surfaces come all in the same plane.

Such a file can obviously be used for all. kinds of work either in woodor in metals, and for fine or rough working such for in-' stance as thatusually done with rasps, all depending upon the greater or lessprojection of the teeth.

What I claim is:

1. A file comprising a frame, and a plurality of small plates pivotallymounted on axes transverse of said frame, said plates being arranged inseries running transversely of said frame, and means for varying theangular position of said plates on their pivots.

2. A file comprising a frame, and a plurality of small plates pivotallymounted on axes transverse of said frame, said plates being arranged inseries running transversely of said frame, and means for varying theangular position of said plates on their pivots, the plates of onetransverse series being alternately located between the plates of acontiguous transverse series.

In witness whereof I have hereunto signed my name in the presence of twosubscribing witnesses.

LUIGI JANO. Witnesses:

ANDREA Lnmo, HENRIETTA DELPERNO.

copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

